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devlink: Add new "event_eq_size" generic device param

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Add new device generic parameter to determine the size of the
asynchronous control events EQ.

For example, to reduce event EQ size to 64, execute:
$ devlink dev param set pci/0000:06:00.0 \
              name event_eq_size value 64 cmode driverinit
$ devlink dev reload pci/0000:06:00.0

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Shay Drory 2021-12-09 12:09:26 +02:00 committed by Saeed Mahameed
parent 0844fa5f7b
commit 0b5705ebc3
3 changed files with 12 additions and 0 deletions
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3
Documentation/networking/devlink/devlink-params.rst
View File

@ -132,3 +132,6 @@ own name.
* - ``io_eq_size``
- u32
- Control the size of I/O completion EQs.
* - ``event_eq_size``
- u32
- Control the size of asynchronous control events EQ.

4
include/net/devlink.h
View File

@ -460,6 +460,7 @@ enum devlink_param_generic_id {
DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
DEVLINK_PARAM_GENERIC_ID_ENABLE_IWARP,
DEVLINK_PARAM_GENERIC_ID_IO_EQ_SIZE,
DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
/* add new param generic ids above here*/
__DEVLINK_PARAM_GENERIC_ID_MAX,
@ -515,6 +516,9 @@ enum devlink_param_generic_id {
#define DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME "io_eq_size"
#define DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE DEVLINK_PARAM_TYPE_U32
#define DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME "event_eq_size"
#define DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE DEVLINK_PARAM_TYPE_U32
#define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate) \
{ \
.id = DEVLINK_PARAM_GENERIC_ID_##_id, \

5
net/core/devlink.c
View File

@ -4471,6 +4471,11 @@ static const struct devlink_param devlink_param_generic[] = {
.name = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_NAME,
.type = DEVLINK_PARAM_GENERIC_IO_EQ_SIZE_TYPE,
},
{
.id = DEVLINK_PARAM_GENERIC_ID_EVENT_EQ_SIZE,
.name = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_NAME,
.type = DEVLINK_PARAM_GENERIC_EVENT_EQ_SIZE_TYPE,
},
};
static int devlink_param_generic_verify(const struct devlink_param *param)